EP1711692B1 - Verbesserte ventildichtungsanordnung für drehventilmotor - Google Patents

Verbesserte ventildichtungsanordnung für drehventilmotor Download PDF

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Publication number
EP1711692B1
EP1711692B1 EP04822305.1A EP04822305A EP1711692B1 EP 1711692 B1 EP1711692 B1 EP 1711692B1 EP 04822305 A EP04822305 A EP 04822305A EP 1711692 B1 EP1711692 B1 EP 1711692B1
Authority
EP
European Patent Office
Prior art keywords
valve
rotary
seal
valve body
exhaust
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP04822305.1A
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English (en)
French (fr)
Other versions
EP1711692A2 (de
EP1711692A4 (de
Inventor
George J. Coates
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Individual
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Publication of EP1711692A2 publication Critical patent/EP1711692A2/de
Publication of EP1711692A4 publication Critical patent/EP1711692A4/de
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Publication of EP1711692B1 publication Critical patent/EP1711692B1/de
Not-in-force legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/02—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves
    • F01L7/021—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves with one rotary valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/10—Rotary or oscillatory slide valve-gear or valve arrangements with valves of other specific shape, e.g. spherical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/16—Sealing or packing arrangements specially therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2301/00—Using particular materials
    • F01L2301/02—Using ceramic materials

Definitions

  • the present invention relates to an internal combustion engine of the piston-cylinder type having a spherical rotary valve assembly for the introduction of the fuel/air mixture to the cylinder and the evacuation of the exhaust gases, and is particularly directed to the floating valve seals for such rotary valve assembly and means for regulating pressure therein, particularly in long stroke, high compression engines such as diesels.
  • the Applicant herein has directed considerable attention to the internal combustion engine of the piston-cylinder type and in particular to the replacement of the poppet valve system, including the poppet valve, springs, mountings and associated cam shaft, with a spherical rotary valve assembly for the introduction of the fuel air mixture into the cylinder and for the evacuation of the exhaust gases.
  • Applicant is the named inventor in U.S. Patent 4,989,576 , "Internal Combustion Engine”; U.S. Patent 4,944,261 , "Spherical Rotary Valve Assembly for Internal Combustion Engine”; U.S. Patent 4,953,527 , "Spherical Rotary Valve Assembly for Internal Combustion Engine”; U.S.
  • Patent 4,976,232 "Valve Seal for Rotary Valve Engine”; U.S. Pat. No. 4,989,558 , "Spherical Rotary Valve Assembly for Internal Combustion Engine”; U.S. Pat. No. 5,109,814 , “Spherical Rotary Valve”; U.S. Pat. No. 5,361,739 , “Spherical Rotary Valve Assembly for Use in a Rotary Valve Internal Combustion Engine”; and U.S. Pat. No. 6,308,676 B1 , “Cooling System for Rotary Valve Engine” and U.S. Pat. No. 6,718,933 B1 , “Valve Seal for Rotary Valve Engine”.
  • the aforementioned U.S. Patents are incorporated herein as if set forth in length and in detail.
  • valve seal as described in Applicant's prior patents is a floating valve seal within a valve seat.
  • the valve seal is positioned in the lower half of the split head assembly proximate the intake port and exhaust port for the cylinder.
  • a biasing means is positioned within the valve seat and the valve seal is positioned above the biasing means.
  • the upper surface of the valve seal is arcuate in shape conforming to the periphery of the rotary intake or rotary exhaust valve of the spherical rotary intake or spherical rotary exhaust valve assembly.
  • the underbody of the valve seal sitting within the valve seat would have one or more sealing rings positioned thereabout in an annular sealing contact with the outer wall of the valve seat.
  • valve seal floats within the valve seat and there is a slight gap between the inner wall of the valve seat and the valve seal which allows for the compressed gases to enter the valve seat through this gap and pressurize the area between the valve seal and the valve seat during the compression stroke which further provides for tight sealing contact between the valve seal and the spherical rotary intake and spherical rotary exhaust valves.
  • the assembly works without modification because of the relatively short stroke of the piston and the resultant pressures developed.
  • long stroke engines such as diesels, in which the compression is significantly greater than in a conventional internal combustion engine, and which compression actually results in the detonation of the fuel/air mixture under signficantly higher pressure
  • the valve seal of a rotary valve assembly for a diesel engine requires a modified structure in that the compression gases would cause excessive pressure on the floating valve seal and its contact with the spherical rotary intake valve or spherical rotary exhaust valve.
  • ES2117541 discloses means for opening and closing inlet and exhaust tubes and a combustion chamber, which comprise one, two or three rotary spheres provided with one, two or four conduits in such a manner that, in at least a first position, one of the aforesaid conduits is connected with the inlet tube and in at least a second position is connected to the exhaust tube.
  • the sphere or spheres is or are placed on a self-adjustable valve seat which is continuously pressed against the corresponding sphere in order to produce a hermetic seal between sphere and seat.
  • the fact that the valve or valves is or are spherical allows the movement of them to be uniform, creating no vibrations
  • the present invention which is the subject to this application relates to the floating valve seal and means for regulating pressure therein.
  • An object of the present invention is to provide for a novel and improved valve seal for a rotary valve engine.
  • a further object of the present invention is to provide for a novel and improved valve seal for a rotary valve engine in which the ceramic insert of the valve seal is positioned in a locking angle for improved life span.
  • a still further object of the present invention is to provide for a novel and improved valve seal for a rotary valve engine in which a gas tight seal is maintained by the pressure developed in the cylinder and combustion chamber.
  • a still further object of the present invention is to provide for an improved and novel valve seal for a spherical rotary valve assembly which requires no external lubrication.
  • a still further object of the present invention is to provide for a novel and improved valve, valve seal and cylinder head/combustion chamber arrangement for a rotary valve engine.
  • a still further object of the present invention is to provide for a novel and improved floating valve seal arrangement for a rotary valve engine assembly which regulates the pressure within the valve seal.
  • valve seal for a rotary valve assembly as specified in claim 1.
  • valve seal for a rotary valve assembly as specified in any of claims 2 - 5.
  • a valve seal for a rotary valve assembly for use in an internal combustion engine of the piston and cylinder type, wherein the cylinder head/combustion chamber is designed for high compression and of long stroke, such as a diesel engine, the rotary valves and the valve seals being positioned in relationship so as to permit charging of the cylinder with a fuel/air mixture and evacuation of spent gases, and to regulate the pressure within the valve seal and valve seat and hence regulate the pressure between the valve seal and the rotary valve.
  • FIG. 1 there is illustrated an end cross-sectional view of an embodiment of the spherical rotary valve assembly of Applicant's prior patents detailing the relationship between a rotary intake valve 10 enclosed within an upper half 12 and a lower half 14 of a split head assembly.
  • the split head assembly is secured to an engine block having cylinder 16 within which piston 18 reciprocates.
  • the split head assembly comprising upper half 12 and lower half 14 defines a drum accommodating cavity 20 within which rotary intake valve 10 is positioned.
  • Rotary intake valve 10 is positioned on shaft 22 which passes through a centrally positioned aperture 24 on the rotary intake valve 10.
  • rotary intake valve to provides for dommucication between fuel an inlet port 26 and cylinder 16 by means of an aperture 30 positioned on the spherical periphery 21 of the rotary valve 10 which comes into successive registration with inlet port 32 to cylinder 16.
  • Rotary intake valve 10 rotating within drum accommodating cavity 20 on shaft 22 is in contact with valve seal 35, annularly positioned in an annular groove or seat 38 about inlet port 32 to cylinder 16.
  • Valve seal 35 serves to provide a seal to insure that the fuel/air mixture passes from rotary intake valve 10 into cylinder 16 during the intake stroke and further provides a seal with rotary intake valve 10 during the compression stroke to insure that the ignition of the fuel/air mixture occurs within cylinder 16 and does not migrate into drum accommodating cavity 20. Further, seal 35 provides a seal with rotary intake valve 10 during the exhaust stroke to insure that the exhaust gases exit through the rotary exhaust valve.
  • valve seal as contained herein is made with respect to a rotary intake valve as shown and illustrated in Figure 1 .
  • Valve seal is of the same design and serves the same purpose and function with respect to its relationship to the rotary exhaust valve of the spherical rotary valve assembly as disclosed in Applicant's prior patents heretofore identified. It is further understood that each cylinder would have at least one rotary intake valve and one rotary exhaust valve and a valve seal associated with each.
  • valve seal 36 has a centrally disposed aperture 40 alignable with inlet port 32 when valve seal 36 is seated in annular groove or seat 38.
  • the upper annular surface 42 of valve body 37 is curved inwardly towards the center of aperture 40. This curvature corresponding to the spherical periphery curvature 23 of the rotary intake valve 10.
  • Upper surface 42 of valve body 37 is formed with an annular groove 44 which is defined by an inner side wall 46 and outer side wall 48.
  • Annular groove 44 is for receipt of a ceramic carbon insert lubricating ring 52.
  • the ceramic carbon insert lubricating ring 52 is positioned in the annular groove 44 such that its upper surface 54 corresponds with the curvature of the upper surface 42 of valve body 37.
  • valve body 37 would be heated so that it would undergo slight expansion.
  • the ceramic carbon insert lubricating ring 52 would then be inserted into annular groove 44 during its heating process.
  • the valve body 37 would then be allowed to cool.
  • outer side wall 48 of the annular groove is slightly offset from 90 degrees in the direction of inner side wall 46, the ceramic carbon insert lubricating ring 52 is locked in position by this "locking angle" and is assured of remaining in position regardless of how hot the valve seal 36 became during the combustion process of the internal combustion engine. This is particularly important when the internal combustion engine to which the valve seal is affixed is being powered by natural gas or diesel which generate substantially higher temperatures and pressure than conventional gasoline fuel.
  • valve seal 36 is stepped and formed with a spaced apart annular rib 56 for the receipt and positioning of at least one sealing or blast ring 58 which function much like a piston ring establishing a seal between valve seal 36 side wall 54 and the periphery of annular groove or seat 38 about inlet port 32.
  • annular rib 56 for the receipt and positioning of at least one sealing or blast ring 58 which function much like a piston ring establishing a seal between valve seal 36 side wall 54 and the periphery of annular groove or seat 38 about inlet port 32.
  • one rib 56 and one sealing or blast ring 58 there is illustrated. However, if the depth of sidewall 54 were increased, the number of blast rings may be increased.
  • valve seal body Contact between the valve body and the peripheral surface of rotary intake valve 10 is maintained by an annular beveled spring 60 positioned in the annular receiving groove of the valve seat.
  • the pressure to be maintained upwardly on valve seal body is in the range of between 28.35g to 113.398g (1 to 4 ounces) as a result of the use of beveled spring 6.
  • valve seat 38 has positioned therein a pressure regulating ring 64.
  • the increased gas pressure within the cylinder during the compression and power strokes was utilized to augment the sealing of the valve body with the peripheral surface of the rotary valve by means of annular passageway 66. It has been found that in short stroke engines the increase compression within the valve seat during the compression and power strokes did not have to be regulated. However, in long stroke and high compression engines, such as diesels, the amount of pressure within the valve seat which increases the contact of the valve body with the peripheral surface of the rotary valve must be regulated or the seal will generate a braking effect with respect to the rotation of the rotary valve.
  • pressure regulating ring 64 is positioned in an annular groove 65 on the inner wall of the valve seat 38 in the path of the compressed gases from the cylinder during the compression and power stroke. Pressure regulating ring 64 is in contact with the inner annular surface of the valve body 36 and pressure regulating ring 64 has a plurality of apertures 66 formed on its outer circumference which allows the compressed gases from the cylinder to pass through apertures 66 and into the valve seat 38 beneath the valve body 36 to allow for increased pressure on the valve body with the peripheral surface of the rotary valve.
  • FIG. 4 is a top view of the pressure regulating ring of the present invention.
  • the apertures 66 are in the form of semi circular apertures formed on the outer circumference or blast ring 64.
  • Applicant's "floating" valve seal body allowed the compressed gases during the compression and power stroke to bleed into the valve seat by means of an annular gap 68between the inner circumferential wall of the valve body and the inner circumferential wall of the valve seat 38.
  • the pressure regulating ring 64 serves to limit the passage of the compressed gases via this route by blocking the route and only having a plurality of apertures 66 available for the introduction of the compressed gases into the valve seat 38 beneath the valve body 36.
  • the number of apertures 66 can be varied depending upon the stroke and compression of the engine as measured by suitable measuring techniques.
  • valve seal and the valve seat of prior prototypes of the Applicant/Inventor called for the valve seat to be friction fit within an annular groove within the lower head of the split head assembly.
  • the valve and valve seat of the present invention may also be friction mounted in such an annular groove.
  • the valve seat of the present invention are directed to high compression long stroke engines of significantly higher compression than a normal internal combustion engine found in an automobile, the valve seat could be externally threaded on its external circumference 70 so as to be threadedly secured to the annular groove in the lower head of the split head assembly which would similarly be threaded for receipt of the valve seat.

Claims (5)

  1. Ventildichtung (36) für eine Drehventilanordnung zur Verwendung in Verbrennungsmotoren des Typs mit Kolben und Zylinder mit hoher Verdichtung und langem Hub, wobei die Drehventilanordnung in einem zweiteiligen Zylinderkopf positioniert ist, wobei der Zylinderkopf eine Vielzahl von Trommelunterbringungshohlräumen zur Aufnahme einer Vielzahl von Einlassdrehventilen und Auslassdrehventilen definiert, wobei die Einlassdrehventile und die Auslassdrehventile einen kugelförmigen Abschnitt aufweisen, der von zwei parallelen Ebenen der Kugel definiert wird, wobei die Ebenen symmetrisch um die Mitte der Kugel angeordnet sind und eine kugelförmige Begrenzungsfläche und ebenflächige Stirnwände definieren, wobei die Einlassdrehventile und die Auslassdrehventile in gasdichtem dichtenden Kontakt mit einem Einlasskanal bzw. einem Auslasskanal auf dem Wellenmittel in den Trommelunterbringungshohlräumen montiert sind, wobei das Einlassdrehventil und das Auslassdrehventil Durchgänge dadurch hindurch für das Einbringen und Unterbrechen von Kraftstoff-Luft-Gemisch zu dem Motor bzw. das Auslassen von Abgasen aus dem Motor aufweisen, wobei der gasdichte dichtende Kontakt des Einlassdrehventils und des Auslassdrehventils des Einlasskanals bzw. des Auslasskanals von einer Ventildichtung (36) und einem Ventilsitz (38) erreicht wird, wobei die Ventildichtung und der Ventilsitz Folgendes umfassen:
    einen Ventilkörper (37) mit einem im Wesentlichen kreisförmigen Querschnitt, wobei der Ventilkörper (37) eine gekrümmte ringförmige obere Oberfläche (42) aufweist, die der kugelförmigen Begrenzungsfläche des Einlassventils oder des Auslassventils entspricht, wobei der Ventilkörper (37) eine Öffnung (30) dadurch hindurch aufweist, die von einer mit der Öffnung des Einlasskanals oder des Auslasskanals zusammenfallenden inneren kreisförmigen Seitenwand definiert wird, wobei der Ventilkörper (37) eine an der gekrümmten oberen Oberfläche um die Öffnung herum gebildete ringförmige Aufnahmenut (44) zur Aufnahme eines Schmierringeinsatzes (52) aufweist, wobei der Schmierringeinsatz eine gekrümmte obere Oberfläche aufweist, die zur gekrümmten oberen Oberfläche des Ventilkörpers (37) komplementär ist;
    wobei der Ventilkörper (37) weiter eine äußere Umfangsseitenwand aufweist, an der eine Vielzahl von Rippen (56) für das Positionieren einer Vielzahl von Dichtungsringen (58) um die äußere Umfangsseitenwand des Ventilkörpers (37) herum für den dichtenden Kontakt des Ventilkörpers (37) an einer äußeren Wand des Ventilsitzes gebildet sind;
    wobei der Ventilsitz (38) eine äußere Wand und eine innere Wand (62) aufweist, die eine ringförmige Nut zur Aufnahme des Ventilkörpers (37) definieren, wobei an einer innenliegenden Oberfläche der inneren Wand (62) des Ventilsitzes eine ringförmige Nut (65) zur Aufnahme eines Druckregulierrings (64) gebildet ist, wobei sich der Druckregulierring (64) in Kontakt mit dem Ventilkörper (37) befindet, dadurch gekennzeichnet, dass der Druckregulierring (64) eine Vielzahl von Durchgängen (66) dadurch hindurch für das Hindurchgelangen von verdichteten Gasen während eines Verdichtungshubs und Krafthubs des Motors aufweist, um nach oben gerichteten Dichtungsdruck auf den Ventilkörper auszuüben.
  2. Ventildichtung (36) für eine Drehventilanordnung nach Anspruch 1, wobei die Durchgänge (66) des Druckregulierrings halbkreisförmig sind und an einer äußeren Begrenzungsfläche des Druckregulierrings (64) gebildet sind.
  3. Ventildichtung (36) für eine Drehventilanordnung nach Anspruch 1, wobei die Anzahl von Durchgängen (66) in dem Druckegulierring (64) den gewünschten nach oben gerichteten Druck, der auf den Ventilkörper (37) ausgeübt wird, bestimmt.
  4. Ventildichtung (36) für eine Drehventilanordnung nach Anspruch 1, wobei der Ventilsitz (38) reibschlüssig in einer Nut in dem zweiteiligen Zylinderkopf positioniert ist.
  5. Ventildichtung (36) für eine Drehventilanordnung nach Anspruch 1, wobei der Ventilsitz mittels Gewinde in einer ringförmigen Nut in dem zweiteiligen Zylinderkopf befestigt ist.
EP04822305.1A 2003-10-27 2004-10-26 Verbesserte ventildichtungsanordnung für drehventilmotor Not-in-force EP1711692B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/693,155 US6880511B1 (en) 2003-10-27 2003-10-27 Valve seal assembly for rotary valve engine
PCT/US2004/035377 WO2006009567A2 (en) 2003-10-27 2004-10-26 Improved valve seal assembly for rotary valve engine

Publications (3)

Publication Number Publication Date
EP1711692A2 EP1711692A2 (de) 2006-10-18
EP1711692A4 EP1711692A4 (de) 2016-08-31
EP1711692B1 true EP1711692B1 (de) 2018-01-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04822305.1A Not-in-force EP1711692B1 (de) 2003-10-27 2004-10-26 Verbesserte ventildichtungsanordnung für drehventilmotor

Country Status (10)

Country Link
US (1) US6880511B1 (de)
EP (1) EP1711692B1 (de)
JP (1) JP4550066B2 (de)
KR (1) KR101150007B1 (de)
CN (1) CN101415911B (de)
AU (1) AU2004321737B2 (de)
CA (1) CA2553401C (de)
HK (1) HK1128318A1 (de)
WO (1) WO2006009567A2 (de)
ZA (1) ZA200603302B (de)

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US7721689B2 (en) * 2006-12-28 2010-05-25 Perkins Engines Company Limited System and method for controlling fluid flow to or from a cylinder of an internal combustion engine
US7926461B2 (en) * 2006-12-28 2011-04-19 Perkins Engines Company Limited System for controlling fluid flow
US7591240B2 (en) * 2006-12-28 2009-09-22 Perkins Engines Company Limited Method for providing a mixture of air and exhaust
US8100144B2 (en) * 2006-12-28 2012-01-24 Perkins Engines Company Limited Mounting arrangement for a rotary valve
US8100102B2 (en) * 2006-12-28 2012-01-24 Perkins Engines Company Limited Cylinder head for an internal combustion engine
US7802550B2 (en) * 2006-12-28 2010-09-28 Caterpillar Inc Cylinder head arrangement including a rotary valve
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EP2573337B1 (de) 2011-09-23 2014-11-12 Arno Hofmann Anordnung eines Schieberventils und eines Dichtungssystems zum Abdichten des Schieberventils bei einer Wärmekraftmaschine
CN106271381B (zh) * 2016-08-29 2019-04-02 中航动力股份有限公司 一种密封组件及其加工方法
DK180650B1 (en) * 2020-02-28 2021-11-11 wolter Thomas A spherical rotary valve assembly for an internal combustion engine

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Also Published As

Publication number Publication date
WO2006009567A3 (en) 2009-04-02
KR20060090992A (ko) 2006-08-17
CA2553401A1 (en) 2006-01-26
JP2007533896A (ja) 2007-11-22
HK1128318A1 (en) 2009-10-23
US20050087165A1 (en) 2005-04-28
CN101415911B (zh) 2012-06-27
US6880511B1 (en) 2005-04-19
ZA200603302B (en) 2009-09-30
JP4550066B2 (ja) 2010-09-22
KR101150007B1 (ko) 2012-06-01
EP1711692A2 (de) 2006-10-18
CN101415911A (zh) 2009-04-22
AU2004321737B2 (en) 2011-03-03
WO2006009567A2 (en) 2006-01-26
CA2553401C (en) 2009-12-15
EP1711692A4 (de) 2016-08-31
AU2004321737A1 (en) 2006-01-26

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